Yes, it distorts the sense of smell and taste - my mother-in-law would smell an annoying floral aroma everywhere, can’t smell certain foods or she would get immediate heartburn, and couldn’t taste salt or taste it too much in certain hours of the day. It’s weird! But we tend to not take our sense of smell and taste so seriously so I think it should be very important to the brain to have a healthy sense of smell and taste or else you would get these “hallucinations” because it cannot be a real allergy.